ABSTRACT
This study proposes an intervention for stroke patients in which electrical stimulation of muscles in the affected arm is supplied when movement intention is detected from the electroencephalographic signal. The detection relies on the combined analysis of two movement related cortical patterns: the event-related desynchronization and the bereitschaftspotential. Results with two healthy subjects and three chronic stroke patients show that reliable EEG-based estimations of the movement onsets can be generated (on average, 66.9 ± 26.4 % of the movements are detected with 0.42 ± 0.17 false activations per minute) which in turn give rise to electrical stimuli providing sensory feedback tightly associated to the movement planning (average detection latency of the onsets of the movements was 54.4 ± 287.9 ms).
Subject(s)
Electroencephalography/methods , Intention , Movement/physiology , Muscles/physiology , Stroke/physiopathology , Upper Extremity/physiology , Adult , Aged , Electric Stimulation , Female , Humans , Male , Middle AgedABSTRACT
La fractura de la epífisis proximal del fémur es una causa importante de mortalidad, morbilidad y pérdida de nivel funcional. Además conlleva una carga económica y social ampliamente reconocida. Los protectores de cadera son dispositivos a modo de escudo almohadillado que, colocados sobre el trocánter mayor del fémur, han demostrado su eficacia en la reducción del número de fracturas de cadera en ancianos de alto riesgo, como así lo confirman los numerosos trabajos llevados a cabo en la última década. Pero si bien apenas muestran efectos deletéreos, su aceptabilidad, y por ende su efectividad, han resultado escasas. El grupo de sujetos al que va dirigido constituye una población con unas características particulares, especialmente si viven en residencias (mayor incremento de demencia, incontinencia y edades muy longevas), habiéndose comprobado lo importante que resulta el compromiso del personal asistencial en la aceptación y continuidad en el uso del protector (AU)
Subject(s)
Aged , Female , Male , Humans , Protective Devices , Hip Fractures/prevention & control , Health of the Elderly , Osteoporosis/epidemiology , Risk Factors , Accidental Falls/prevention & control , Institutionalization , Homes for the Aged/trendsABSTRACT
This article relates the results of a research made about 26 persons who are working in a noisy environment and whose sense of hearing was damaged although the noise did not exceed the authorized limits (90 dB.) the group of persons was examined every year during 5 years and the average hearing loss was computed every year as well. Average and total losses are computed and it appears that the loss during the last year is much higher than during the previous years.
